Improvement in giffard s injector



UNITED STATES PATENT rrica NATHAN COPE, OF CINCINNATI, OHIO, ASSIGNOR TO EZRA COPE, OF

SAME

PLACE.

Spor-Mirafiori forming part o!" Letters latcnt No. 37,542, dalcd January 27, 1563.

To all whom, t may concern:

Be it known that I, NATHAN Corn, of Cincinnati, in the county of Hamilton and State of Ohio, have invented (and assigned to Ezra Oope,of same place) a new and usefuIImprovement to be applied to the Giffard Injector, andI do hereby declare that the following is a full, clear, and exact description of the construction and operation of the same, reference being had to the annexed drawings, making a part of this specification, in which- Figure lis a longitudinal section, and Fig. 2 is a longitudinal elevation.

Like letters of reference refer to like parts.

The nature ot' my invention consists, rst, in the application ofa secondary water-supply for the condensed or heated waterto the wellknown Giffard injector at the point as known in the Giifard arrangement as the overllow or waste77 pipe; second, also the manner of regulating the amount of water required in connection with the said waste or overflowt'. c., to so regulate the cold-water supply as to produce the greatest amount of vacuum between nozzles D and E. (This is soon found by a little practice with the instrument.)

The advantages of this arrangement are, ii rst, theincreased capacity of the instrument without increasing the consumption of steam,as the great momentum imparted to the water-jet (in all injectors) produces a partial vacuum in the space around the injecting-nozzle, which space, when supplied with condensed or heated water, brings it in contact with said jet at F, and carries a portion of it along into the boiler; second, the greatest practical difficulty heretofore with the Gift-ard injector has been the water-supply, which, for the sure and certain working of the instrument, must be at a very low temperature,so as to insure a perfect condensation of the steam as it issues from the nozzle B,A otherwise if the steam was not perfectly condensed, it would expand after it had left the injector-nozzle D, and thus break the water-jet before it had reached the receivingnozzle F, while in my arrangement the water can be admitted at a temperature bordering on to the heat of the water-jet after it has received the steam from the steam-nozzle, thereby producing a degree of economy that has not been before attained in fuel, beside the advantage of having pure distilled water for the boiler-supply from the condensation of the steam ol" steam-engines, water-heaters, warming buildings by the exhaust or steam taken direct Afrom the boilers, &c.

To enable others skilled in the art to make and use my invention, I will proceed to describe its construction and operation by referring to the accompanying drawings,of which- Fig. l is a longitudinal section, and Fig. 2 is a longitudinal elevation of Giffard injector with my improvement attached.

Like letters of reference refer to like paris in both igures.

The arrows show the direction of the eurrents.

A is the shell or main bodyT of G-iffards injector; D, the steam-nozzle; C, water-supply.

D is the nozzle through which the combined steam and water are injected.

E is the receiving-lamme, which connects with the boiler.

F is the space between the discharge and receiving nozzles, (generally called the break.)

(l is the overflow or waste eomiminieating with the break F; but in my arrangement is used for the secondary water-supply, or may be opened as a waste when desired .to startthe injector.

H is the regulating-valve, which is of the threc-way-cock class. This form is used for its cheapness and simplicity, (as by it one cock answers the place of two of the ordinary constructiom) and facilitates the operation of starting the instrument.

I is the secondary water-supply pipe, communicating with G through the valve H.

K is the waste or over'tlow,also commu nicating with G through the valveH when it is desired to start the injector.

L is the steam-pipe.

M is the water-supply pipe, leading to the boiler.

Then it is desired to start or put this njector in operation the wateris admitted at the usual water-supply,C; then steam is turnedon in such quantities by means of the regulatingmandrel O as will cause the water to be injected across the space or break F into thereceiving-nozzle E, during which time the valve of H ofthe secondary supply is turned so as to leave the space Gr open to the atmosphere and the supply-water shut olf.

To bring,` the secondary water-supply into aetion,it is only necessary to turn the valve H until Water is admitted in such quantities as meets the demands of the Water-jet J, which can be determined bythe sound produced by the instrument, with which a person of but slight experience soon beeomes familiar. This supply can be admitted at a degree of heat about equal to the passing jet, or. in fact, at any tempera-turc less than 2l2of Fahrenheit; but the water at the 'first or usual supply at D should and has always been at as low a temperaturc as possible, so as to insure a complete and perfect condensation of the steam to insure success, (as referred to above.)

I do not claim any part of the injector as patented by Henry Gili'ard, April 24, A. D. 1860. for that l am familiar With and is Well known; but

Vhat I do claim as my invention, and desire to secure by Letters Patent, is-

l. The Within-described arrangement of thc secondary Water-supply to the Giffard injector, as herein set forth.

2. The supplying of aportion ofthe Water of a boiler-feeder by a jet of water that has momentum imparted to it by a jet of steam, said Water-jet acting upon the Water of the secondary supply, as herein described.

The Waste-pipe K, in combination with secondary water-supply G, which may be opened or closed at pleasure for the purpose ofregulating,` the action of the injector, substantially as and for thc purpose set forth.

NATHAN COPE. [13. s]

XVi tnesses:

.Moon A. S'rEyENs, H. N. CLARK. 

